To find dialing codes and phone number formatting information for making international calls to Houston, TX from countries worldwide, please follow the links below.

• Dialing codes - at a glance
• International access codes
• US & other country codes
• Houston area codes
• Houston phone number format
• Dialing codes for selected countries

On these pages, you'll find in-depth dialing code and phone number formatting information.

Related Topics

• International phone number formatting information
• Dialing procedure for calling Houston
• Call Houston using a calling card
• Call Houston using VoIP
• Detailed dialing instructions by country